Fig. 1.

Diagram illustrating the position of brainstem transection for the low cerveau isolé preparation.A, Sagittal view of a rat brain showing the site of transection between the pons and the medulla oblongata (1 mm posterior to the lambda, indicated by the thick line).B, Coronal view of the transected areas (shaded) through the cerebellum and the brainstem.Thick lines illustrate the initial and final positions of the transection knife (a flattened needle). See Materials and Methods for details. Figures are redrawn from the rat atlas of Paxinos and Watson (1997).